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SST/U421 Series


The SST/U421 Series Low-Noise, Low-Drift, Monolithic Dual N-Channel JFET amplifier is targeted for use in a wide range of precision instrumentation and sensor applications. The series is available in the TO-71 6L, TO-78 7L, PDIP 8L and SOIC 8L RoHS package, as well as in die form.

Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out.


Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at or call (510) 490-9160. MOQ applies to these specialized services.

Ordering Information

Below are the options you have when ordering this part series:

  • U421 TO-71 6L RoHS

  • U422 TO-71 6L RoHS

  • U423 TO-71 6L RoHS

  • U424 TO-71 6L RoHS

  • U425 TO-71 6L RoHS

  • U426 TO-71 6L RoHS

  • U421 TO-78 7L RoHS

  • U422 TO-78 7L RoHS

  • U423 TO-78 7L RoHS

  • U424 TO-78 7L RoHS

  • U425 TO-78 7L RoHS

  • U426 TO-78 7L RoHS

  • SST421 SOIC 8L RoHS

  • SST422 SOIC 8L RoHS

  • SST423 SOIC 8L RoHS

  • SST424 SOIC 8L RoHS

  • SST425 SOIC 8L RoHS

  • SST426 SOIC 8L RoHS

  • U421 Die

  • U422 Die

  • U423 Die

  • U424 Die

  • U425 Die

  • U426 Die

SST/U421 Series
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